Desalination membranes with ultralow biofouling via synergistic chemical and topological strategies
| Autor: | Jong Suk Lee, Hosik Park, Jung Hyun Lee, You In Park, Min Gyu Shin, Cheol Hun Yoo, Wansuk Choi |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Filtration and Separation 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Topology 01 natural sciences Biochemistry Desalination Silver nanoparticle 0104 chemical sciences Biofouling chemistry.chemical_compound Membrane chemistry Leaching (chemistry) Tannic acid Combination strategy General Materials Science Water treatment Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Journal of Membrane Science. 626:119212 |
| ISSN: | 0376-7388 |
| Popis: | Biofouling is a persistent problem for desalination and water treatment membranes because it critically degrades membrane performance. Here, we report desalination membranes with ultrahigh biofouling resistance fabricated using a synergistic anti-biofouling strategy that combines topological and chemical antifouling modifications. Specifically, both the surface topology and the chemistry of desalination membranes were tailored by creating a biomimetic Sharklet pattern and integrating hydrophilic tannic acid and biocidal silver nanoparticles (AgNPs). The resultant membrane significantly enhanced biofouling resistance compared to the membranes modified by either the topological or chemical modifications alone due to the combinatorial antifouling effect. Importantly, the topological anti-biofouling effect was much more significant than the chemical effect under dynamic flow conditions due to the unique surface flows generated by the Sharklet geometry. Interestingly, the surface flow characteristics of the Sharklet pattern also effectively suppressed the leaching of the incorporated AgNPs and thus prolonged their anti-biofouling effect, highlighting the synergistic effect of the proposed combination strategy. This approach opens a new avenue for the fabrication of functional membranes, coatings and surfaces with superior antifouling and self-cleaning functions by elucidating the underlying antifouling mechanisms. |
| Databáze: | OpenAIRE |
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